You've done exceptionally well for an initial effort but:

1) Contact us must consist of more than a telephone number. Where are you located? Why not implement an email form?
2) Your target market is local, so you might do well to consider adding an "areas served" map.
3) Why not include some useful tips for lawn care, planting, transplanting, gardening, weed control? (FAQ?)
4) Give Google something to index and a reason for users to revisit the site. You need more meat and potatoes.
5) Consider that some users may wish to print a page and that they are not going to appreciate the dark background with white text.
6) As has already been stated, where you see paragraph text which reads "contact us", be sure to link it to your "Contact Us" page.

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